Estimador de tráfego do site (gratuito): como as 5 melhores ferramentas realmente funcionam
Testamos todos os estimadores gratuitos de tráfego do site em 2026. A maioria dá números extremamente diferentes. Aqui está como a matemática funciona por trás, além da combinação gratuita que chega a ±15% da verdade.
Why traffic estimators differ so much
If you check the same domain on Ubersuggest, Similarweb, Semrush, Ahrefs and Tranco, you'll get five different traffic estimates — often varying by 5-10× from each other. This isn't a bug in the tools; it's the fundamental limit of estimating someone else's traffic from outside.
There are three estimation methodologies in use:
- Browser panel data — Similarweb, ex-Alexa: extrapolate from a sample of opt-in panel users
- Search-keyword inference — Ahrefs, Semrush, Ubersuggest: estimate organic traffic from SERP positions × keyword volumes
- ISP / DNS data — Cloudflare Radar, some enterprise tools: actual aggregated DNS query counts
Each captures a different slice of reality:
- Panel data is biased toward the user demographic that installs the panel (skews toward tech / SEO professionals)
- Search-keyword inference completely misses social, direct, email, and referral traffic
- DNS data is the most accurate but only the biggest players (Cloudflare, OpenDNS) have it
The free combo that gets within ±15%
For most domains, combining two free estimates gets you closer to truth than trusting any single one:
- Similarweb free tier — gives the panel-data estimate (5 lookups/mo free)
- Ubersuggest or Semrush AS checker — gives the search-keyword estimate
If the two numbers are within 30% of each other, the average is usually within ±15% of reality. If they disagree by 3× or more, the domain has a weird traffic mix (very social-heavy, or very organic-heavy) and you need a paid tool.
Why we don't display a traffic estimate
People often ask why FeedPulse Rank shows a global rank but not a monthly traffic number. The honest reason: we don't trust any free traffic-estimation methodology enough to bake the number into a public embeddable badge. Rank is a relative ordering and is robust under noise. A monthly visits number ("84,221 visitors/mo") implies precision we cannot deliver from public signals.
For our Verified Traffic seal, we do show monthly visits — but only for sites that have installed our tracking widget, so the number comes from first-party data we own. That's the only context where a free monthly-visits estimate is honest.
What to do with a traffic estimate
Use them for:
- Order-of-magnitude comparison (is this site bigger or smaller than mine?)
- Trend detection (did this site's estimate go up or down over time?)
- Filtering (skip pitching sites with < 10K monthly visits)
Don't use them for:
- Pricing ads (use first-party stats only — that's what Verified Traffic is for)
- Forecasting your own growth (use your own analytics)
- Reporting to clients (they'll catch the imprecision)